A Chiral Superlattice Route to Spin-Split Topological Antiferromagnetism
Abstract
The interplay between chirality and magnetism is a profound topic, spanning particle physics, condensed matter, chemistry and origin of life. In this paper, we study this interplay in the new antiferromagnet (AFM) UOTe, and we report a chiral superlattice route to spin-split topological phenomena from collinear antiferromagnetism. Pristine UOTe is a collinear AFM without Berry curvature or spin-split bands. However, we identify the spontaneous formation of a chiral superlattice in UOTe, which can be viewed as frozen chiral phonons at finite wave vector. When electrons move through the chiral superlattice, their orbital Bloch wavefunction and quantum geometry are modulated by the strong chiral superlattice potential, generating large Berry curvature in the chiral superlattice, which we detect by the nonlinear Hall effect. At 150 K, the chiral superlattice induced Berry curvature couples to the collinear AFM order, generating a giant anomalous Hall angle ~0.14 abruptly near TN that is among the largest in bulk magnets. Moreover, our spin Hanle precession measurement shows that the chiral superlattice also generates spin-polarized current from the collinear AFM, a long-standing goal in spintronics. We shed light on the supermodulation formation mechanism based on chemical ion size and physical interlayer-intralayer energy competitions, using which we propose a design principle to discover similar bond-mismatch superlattices, providing a chiral superlattice pathway through real space engineering of quantum geometry.
Versions
Related
- Switchable chiral antiferromagnetism through nonlinear magnetic susceptibility
- Chiral Antiferromagnetism from Momentum-Space Resonance in a 2D Semiconductor
- Engineering Competing Fractional Topological States in a BHZ Superlattice
- Chiral Phonons Coupled to Spin-Split Bands in Altermagnetic CrSb and MnTe
- Algorithmic Construction of Gapped Boundaries for Topological Stabilizer Codes: A Route to Low-Overhead Planar qLDPC Codes
BibTeX
@misc{dinh2026chiral,
title = {{A Chiral Superlattice Route to Spin-Split Topological Antiferromagnetism}},
author = {Thao Dinh and Mengke Liu and Jian-Xiang Qiu and Sougata Mardanya and Suk Hyun Sung and Xuan Hoang Le and Christopher Broyles and Chengfeng Zhu and Qiaozhi Xu and Haotian Chen and Zack Rehfuss and Yu-Fei Liu and Xiaoyu Zeng and Houchen Li and Peng Guo and Jinchen Liu and Tianye Huang and Jingtian Shi and Michael Smith and Joanna M. Blawat and John Singleton and Ross McDonald and Ivan E. Arvizo and Dongtao Cui and Shao-Liang Zheng and Kenji Watanabe and Takashi Taniguchi and Vineet Kumar Sharma and Sudip Ghorai and Barun Ghosh and Hsin Lin and Ting Yong Lim and Tay-Rong Chang and Arun Bansil and Ivar Martin and Ashvin Vishwanath and Weiwei Xie and Claudia Felser and Jairo Sinova and Anyuan Gao and Mikhail D. Lukin and Jennifer E. Hoffman and Sugata Chowdhury and Qiong Ma and Kai Sun and Ismail El Baggari and Sheng Ran and Talieh S. Ghiasi and Hongkun Park and Philip Kim and Su-Yang Xu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.24242},
eprint = {2610.24242},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.24242},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - A Chiral Superlattice Route to Spin-Split Topological Antiferromagnetism
AU - Thao Dinh
AU - Mengke Liu
AU - Jian-Xiang Qiu
AU - Sougata Mardanya
AU - Suk Hyun Sung
AU - Xuan Hoang Le
AU - Christopher Broyles
AU - Chengfeng Zhu
AU - Qiaozhi Xu
AU - Haotian Chen
AU - Zack Rehfuss
AU - Yu-Fei Liu
AU - Xiaoyu Zeng
AU - Houchen Li
AU - Peng Guo
AU - Jinchen Liu
AU - Tianye Huang
AU - Jingtian Shi
AU - Michael Smith
AU - Joanna M. Blawat
AU - John Singleton
AU - Ross McDonald
AU - Ivan E. Arvizo
AU - Dongtao Cui
AU - Shao-Liang Zheng
AU - Kenji Watanabe
AU - Takashi Taniguchi
AU - Vineet Kumar Sharma
AU - Sudip Ghorai
AU - Barun Ghosh
AU - Hsin Lin
AU - Ting Yong Lim
AU - Tay-Rong Chang
AU - Arun Bansil
AU - Ivar Martin
AU - Ashvin Vishwanath
AU - Weiwei Xie
AU - Claudia Felser
AU - Jairo Sinova
AU - Anyuan Gao
AU - Mikhail D. Lukin
AU - Jennifer E. Hoffman
AU - Sugata Chowdhury
AU - Qiong Ma
AU - Kai Sun
AU - Ismail El Baggari
AU - Sheng Ran
AU - Talieh S. Ghiasi
AU - Hongkun Park
AU - Philip Kim
AU - Su-Yang Xu
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.24242
UR - https://arxiv.org/abs/2610.24242
AB - The interplay between chirality and magnetism is a profound topic, spanning particle physics, condensed matter, chemistry and origin of life. In this paper, we study this interplay in the new antiferromagnet (AFM) UOTe, and we report a chiral superlattice route to spin-split topological phenomena from collinear antiferromagnetism. Pristine UOTe is a collinear AFM without Berry curvature or spin-split bands. However, we identify the spontaneous formation of a chiral superlattice in UOTe, which can be viewed as frozen chiral phonons at finite wave vector. When electrons move through the chiral superlattice, their orbital Bloch wavefunction and quantum geometry are modulated by the strong chiral superlattice potential, generating large Berry curvature in the chiral superlattice, which we detect by the nonlinear Hall effect. At 150 K, the chiral superlattice induced Berry curvature couples to the collinear AFM order, generating a giant anomalous Hall angle ~0.14 abruptly near T_N that is among the largest in bulk magnets. Moreover, our spin Hanle precession measurement shows that the chiral superlattice also generates spin-polarized current from the collinear AFM, a long-standing goal in spintronics. We shed light on the supermodulation formation mechanism based on chemical ion size and physical interlayer-intralayer energy competitions, using which we propose a design principle to discover similar bond-mismatch superlattices, providing a chiral superlattice pathway through real space engineering of quantum geometry.
ER -